The returning PC Mark Mylow (Stewart Wright), who left after the second season, comments on the strangeness of "going to Poland to become a plumber," which was the reason he left the show. "That was quite a story," he says.
The returning PC Mark Mylow calls Al a "Serial Repeater" since he only dates Doc's secretaries, a kind of in-joke for fans being that every quirky cute secretary of Doc's was first courted by, then dated by, then becomes engaged to Al by three different (but very similar) characters.